TeamProject/doc/精读代码（注释）/周卢东注释/tool/ResourceParser.java

/*
 * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.micode.notes.tool;

/*简介：字面意义是资源分析器，实际上就是获取资源并且在程序中使用，比如颜色图片等
 * 实现方法：主要利用R.java这个类，其中包括
 * R.id      组件资源引用
 * R.drawable  图片资源 （被使用）
 * R.layout  布局资源
 * R.menu   菜单资源
 * R.String  文字资源
 * R.style    主题资源 （被使用）
 * 在按顺序设置好相应的id后，就可以编写简单的getXXX函数获取需要的资源
 *
 * 特殊的变量 ：
 * @BG_DEFAULT_COLOR 默认背景颜色（黄）
 * BG_DEFAULT_FONT_SIZE 默认文本大小（中）
 */

public class ResourceParser {

    public static final int YELLOW           = 0;
    public static final int BLUE             = 1;
    public static final int WHITE            = 2;
    public static final int GREEN            = 3;
    public static final int RED              = 4;

    public static final int BG_DEFAULT_COLOR = YELLOW;

    public static final int TEXT_SMALL       = 0;
    public static final int TEXT_MEDIUM      = 1;
    public static final int TEXT_LARGE       = 2;
    public static final int TEXT_SUPER       = 3;

    public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;

    public static class NoteBgResources {
        private final static int [] BG_EDIT_RESOURCES = new int [] {
                R.drawable.edit_yellow,
                R.drawable.edit_blue,
                R.drawable.edit_white,
                R.drawable.edit_green,
                R.drawable.edit_red
        };

        private final static int [] BG_EDIT_TITLE_RESOURCES = new int [] {
                R.drawable.edit_title_yellow,
                R.drawable.edit_title_blue,
                R.drawable.edit_title_white,
                R.drawable.edit_title_green,
                R.drawable.edit_title_red
        };

        public static int getNoteBgResource(int id) {
            return BG_EDIT_RESOURCES[id];
        }

        public static int getNoteTitleBgResource(int id) {
            return BG_EDIT_TITLE_RESOURCES[id];
        }
    }
    //直接获取默认的背景颜色。看不太懂，这个PREFERENCE_SET_BG_COLOR_KEY是个final string,也就是说getBoolean肯定执行else，为什么要这么写
    public static int getDefaultBgId(Context context) {
        if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
                NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
            return (int) (Math.random() * NoteBgResources.BG_EDIT_RESOURCES.length);
        } else {
            return BG_DEFAULT_COLOR;
        }
    }

    public static class NoteItemBgResources {
        private final static int [] BG_FIRST_RESOURCES = new int [] {
                R.drawable.list_yellow_up,
                R.drawable.list_blue_up,
                R.drawable.list_white_up,
                R.drawable.list_green_up,
                R.drawable.list_red_up
        };

        private final static int [] BG_NORMAL_RESOURCES = new int [] {
                R.drawable.list_yellow_middle,
                R.drawable.list_blue_middle,
                R.drawable.list_white_middle,
                R.drawable.list_green_middle,
                R.drawable.list_red_middle
        };

        private final static int [] BG_LAST_RESOURCES = new int [] {
                R.drawable.list_yellow_down,
                R.drawable.list_blue_down,
                R.drawable.list_white_down,
                R.drawable.list_green_down,
                R.drawable.list_red_down,
        };

        private final static int [] BG_SINGLE_RESOURCES = new int [] {
                R.drawable.list_yellow_single,
                R.drawable.list_blue_single,
                R.drawable.list_white_single,
                R.drawable.list_green_single,
                R.drawable.list_red_single
        };

        public static int getNoteBgFirstRes(int id) {
            return BG_FIRST_RESOURCES[id];
        }

        public static int getNoteBgLastRes(int id) {
            return BG_LAST_RESOURCES[id];
        }

        public static int getNoteBgSingleRes(int id) {
            return BG_SINGLE_RESOURCES[id];
        }

        public static int getNoteBgNormalRes(int id) {
            return BG_NORMAL_RESOURCES[id];
        }

        public static int getFolderBgRes() {
            return R.drawable.list_folder;
        }
    }

    public static class WidgetBgResources {
        private final static int [] BG_2X_RESOURCES = new int [] {
                R.drawable.widget_2x_yellow,
                R.drawable.widget_2x_blue,
                R.drawable.widget_2x_white,
                R.drawable.widget_2x_green,
                R.drawable.widget_2x_red,
        };

        public static int getWidget2xBgResource(int id) {
            return BG_2X_RESOURCES[id];
        }

        private final static int [] BG_4X_RESOURCES = new int [] {
                R.drawable.widget_4x_yellow,
                R.drawable.widget_4x_blue,
                R.drawable.widget_4x_white,
                R.drawable.widget_4x_green,
                R.drawable.widget_4x_red
        };

        public static int getWidget4xBgResource(int id) {
            return BG_4X_RESOURCES[id];
        }
    }

    public static class TextAppearanceResources {
        private final static int [] TEXTAPPEARANCE_RESOURCES = new int [] {
                R.style.TextAppearanceNormal,
                R.style.TextAppearanceMedium,
                R.style.TextAppearanceLarge,
                R.style.TextAppearanceSuper
        };

        //这里有一个容错的函数，防止输入的id大于资源总量，若如此，则自动返回默认的设置结果
        public static int getTexAppearanceResource(int id) {
            /**
             * HACKME: Fix bug of store the resource id in shared preference.
             * The id may larger than the length of resources, in this case,
             * return the {@link ResourceParser#BG_DEFAULT_FONT_SIZE}
             */
            if (id >= TEXTAPPEARANCE_RESOURCES.length) {
                return BG_DEFAULT_FONT_SIZE;
            }
            return TEXTAPPEARANCE_RESOURCES[id];
        }

        public static int getResourcesSize() {
            return TEXTAPPEARANCE_RESOURCES.length;
        }
    }
}